Apply a quarter size amount of Masque Extentioniste to wet hair, working from mid-length to ends. Leave on for 5-10 minutes, then rinse.

Length-strengthening mask. Contains Creatine R™ technology, boasting a powerful fusion of Creatine and Ceramides + Maleic Acid, very small particles that penetrate the fiber for reinforcement action and seal cuticles with a uniform coating from roots to tips.

Creatine: an amino acid that penetrates deep to reinforce the internal structure of the hair fiber.